C0616

Code

Generic C — Chassis

Park Brake Control Module Control Circuit Performance

Brand: Generic

Type: C — Chassis

Views: UK: 36 EN: 146 RU: 29

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Page language: EN

Causes

Open, shorted or damaged wiring in the park brake control circuit
Poor or corroded connector or terminal at the park brake control module or actuator
Faulty park brake actuator/motor or stuck mechanical components
Failed park brake control module (internal electronics)
Blown fuse or faulty relay supplying the park brake module
Intermittent ground or low battery/low supply voltage

Symptoms

EPB (electric parking brake) or parking brake warning lamp illuminated
Unable to set or release the electronic parking brake
Park brake attempts to run continuously or cycles repeatedly
Vehicle may show related ABS/traction or chassis control warnings
Possible audible motor noise from actuator without proper movement
Limp or restricted vehicle functions in some systems (rare)

What to check

Read freeze frame and full DTC list with a capable scan tool; note any related codes
Verify battery voltage is within spec and battery connections are clean/tight
Visually inspect wiring harness, terminals and connectors for damage or corrosion
Check fuses and relays feeding the park brake control module
Backprobe connector pins to confirm proper supply voltage and ground
Attempt activation/deactivation of EPB with scan tool while monitoring voltages/currents

Signal parameters

Control input/output: typically a switched battery voltage or PWM command (0–12 V range) depending on vehicle
Actuator coil/motor resistance: typically low (single-digit to low double-digit ohms) — consult vehicle service data
Operating current: can draw several amps during activation (often up to ~10 A+ transient) — verify with appropriate meter
Ground continuity: module ground should show low resistance (
Communication: CAN/LIN messages present if the module is networked — expect valid network traffic when scanned

Diagnostic algorithm

Capture and record all related DTCs and live data with a manufacturer-capable scan tool. Note whether code is current or historical and if it is intermittent.
Verify battery voltage and inspect battery/fuse/relay supplying the EPB module. Replace any blown fuses and retest.
Visually inspect connectors and harness from module to actuator for obvious damage, corrosion, or pin push-out. Repair any damage.
Backprobe the park brake control module connector while commanding the EPB ON/OFF with a scan tool. Verify correct supply voltage, control signal behavior (0–12 V or PWM), and a stable ground.
Measure the actuator/motor coil resistance and compare to service specification. If open/shorted or out of range, replace actuator.
With a clamp meter or current probe, measure actuator current during activation to confirm motor load and identify stalls/overcurrent conditions.
Perform continuity and short-to-power/ground tests on suspect wiring between module and actuator. Repair short/open circuits and protect harness from rubbing points.
If wiring and actuator test good, consider replacing the park brake control module. After replacement, program/configure the new module per manufacturer procedures if required.
Clear codes and perform functional tests (multiple cycles) to confirm repair. Monitor for reoccurrence and road-test if applicable.

Likely causes

Damaged/abraded wiring or chafed insulation near harness routing
Corroded connector pin(s) at the module or actuator
Failed actuator motor winding or gearbox jam
Loss of module ground or fused power feed
Faulty park brake control module (less common than wiring/connectors)

Fault status

⚠️ Status

Park Brake Control Module — Control Circuit Performance: module detected abnormal/unspecified performance on park brake control circuit (voltage, resistance or signal outside expected range).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours